CVE-2020-28600: An out-of-bounds write vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad opensc

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HIGH 7.8DOWNGRADE

CVE-2020-28600 is a high-severity flaw (CVSS 7.8) affecting openscad. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

An out-of-bounds write vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad openscad-2020.12-RC2. A specially crafted STL file can lead to code execution. An attacker can provide a malicious file to trigger this vulnerability.

Why this priority

High severity
Public exploit reference

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.8 (High)
Attack vector	Local
Attack complexity	Low
Privileges needed	None
User interaction	Required
EPSS exploit chance	1.3% (top 30%)
CISA exploited list	No
Weakness	CWE-119, CWE-787
Published	2021-05-10
Last modified	2026-06-17

Publisher (CNA): Talos · Vendor: openscad

Last updated 2026-06-17 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2021-05-10 20:15 UTCPublished CVE record published
2026-06-17 03:10 UTCUpdated Record last modified

openscad openscad DOWNGRADE

Affected: 2020.12 rc2

Fixed in: no fixed release known

Safe to downgrade to: a release before 2020.12

1. Check installed version

apt-cache policy openscad || rpm -q openscad || openscad --version

2. No fixed release: DOWNGRADE to a release before 2020.12 (Debian / Ubuntu)

apt-cache madison openscad sudo apt install openscad=<VERSION_BEFORE_2020.12> sudo apt-mark hold openscad

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list openscad sudo dnf downgrade openscad-<VERSION_BEFORE_2020.12> sudo dnf versionlock add openscad

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2020-28600?

openscad: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2020-28600 being exploited?

CVE-2020-28600 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2020-28600 affect?

CVE-2020-28600 affects openscad. Severity is high (CVSS 7.8). An out-of-bounds write vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad openscad-2020.12-RC2. A specially crafted STL file can lead to code execution. An attacker can provide a malicious file to trigger this

How urgent is CVE-2020-28600?

Priority 50/100. High severity; Public exploit reference

Related CVEs

CVE-2022-0497 HIGH 7.1 UPGRADE A vulnerbiility was found in Openscad, where a .scad file with no trailing newline could cause an out-of-bound
CVE-2022-0496 MEDIUM 5.5 UPGRADE A vulnerbiility was found in Openscad, where a DXF-format drawing with particular (not necessarily malformed!)
CVE-2020-28599 HIGH 7.8 UPGRADE MITIGATE A stack-based buffer overflow vulnerability exists in the import_stl.cc:import_stl() functionality of Openscad

References

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